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4 Written questions

3 Multiple choice questions

  1. they provide positional information in the embryo
  2. 4.5 billion years ago ... 3.9 billion years ago
  3. wolf

3 True/False questions

  1. The relative lengths of the frog and mouse branches in the phylogeny in Figure 26.13 in your textbook indicate that

    frogs evolved before mice.
    the genes of frogs and mice have only coincidental homoplasies.
    the homolog has evolved more slowly in mice.
    the homolog has evolved more rapidly in mice.
    mice evolved before frogs.
    they provide positional information in the embryo


  2. Radiometric dating _____.

    allows us to determine an absolute, errorless date
    only works on rocks younger than 75,000 years
    allows us to indirectly date fossils up to billions of years old based on minerals in surrounding volcanic strata
    relies on the fact that the daughter isotope decays to the parent isotope at a constant rate
    can be used to directly date fossils in sedimentary rock
    "tinkering" with existing structures


  3. Evolution works by _____.

    "tinkering" with existing structures
    predicting the future
    molding the environment to conform to the organisms living in it
    constantly increasing complexity
    converging on a particular phenotype
    "tinkering" with existing structures


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